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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad 2018, kharif 2019 and kharif 2020. Rice varieties were sown at specified row to row distance of 20 cm and plant to plant distance of 10 cm. The plot size remains same 4.0 m ×3.6 m for all the three years. The recommended dose of nitrogen (45 kg/ha), phosphorus (30 kg/ha), potassium (15 kg/ha) were applied for variety ‘Pusa 1121’ where as for variety ‘Basmati-370’ and ‘SRJ -129’ the recommended dose of nitrogen (30 kg/ha), phosphorus (20 kg/ha), potassium (10 kg/ha) in the form of Urea, Diammounium phosphate and murate of potash .Full dose of Phosphorus and potassium were applied as basal in all the treatments .Half dose of nitrogen was applied as basal dose at the time of sowing whereas remaining half nitrogen was applied in two equal splits at 45 DAS and panicle initiation stage . The plant height and yield attributes viz., no. of tillers/plant, no. of grains/panicle and 1000-grain weight (g), grain yield, straw yield and biological yield were calculated by using standard formula during three years. The data recorded for various characters were subjected to statistical analysis according to procedure outlined by Cochran and Cox (1963). All the comparisons were worked out at 5 per cent level of significance during three years. Results Result of pooled data of plant height (cm) of rice presented in Table 1 revealed that plant height at harvest of rice was significantly influenced by different sowing dates and different varieties of rice during all the three-growing season by direct seeding. Among the three planting dates, significantly highest plant height at harvest (136.45 cm) was recorded with (early sown) 1 st June sowing date whereas significantly lowest plant height at harvest was recorded with (late sown) 1 st July sowing dates. 16 th June (Mid sown) sowing date was found significantly different from 1 st June and 1 st July sowing date in plant height (126.91 cm) during all the three crop growing season. It was might be due to the reason that late sowing (1 st July) had shorter growing period due to photoperiodic response whereas (1 st June sowing date had longer growing season which produced taller plants and had lesser dry matter accumulation as compared to other planting dates. Similar, results were also reported by Bashir et al., (2010). Among the different rice varieties significantly highest pooled plant height of rice (158.48 cm) at harvest was recorded with variety ‘Basmati-370’ whereas significantly minimum plant height at harvest was recorded with variety ‘SRJ -129’ whereas variety ‘Pusa-1121’ was found significantly different from other two varieties in plant height. This was might be due to reason of different genotypes of rice varieties which may be responsible for the difference in growth characters. These results were in line with the findings of Thomas and Lal (2012). Grain yield is the function of integrated effect of all individual yield components and interaction between the genetic makeup and plant environment during the growing period (Banotra et al., 2021). Yield parameters viz. grain yield and straw yield of rice were significantly influenced by different planting dates and rice varieties. Among the different planting dates significantly highest grain yield (28.42 qha -1 ) and straw yield (76.56 qha -1 ) of rice was recorded with 1 st June sowing date whereas 294 | Page Climate resilient agriculture for risk mitigation
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad significantly lowest grain yield (21.82 qha -1 ) and straw yield (65.89 qha -1 ) of rice was recorded with 1 st July sowing date. Among the different rice varieties, significantly highest grain yield (29.72 qha -1 ) and lowest straw yield and of rice was recorded with variety ‘SRJ- 129’ whereas significantly lowest grain yield (21.08 qha -1 ) and highest straw yield of rice were recorded with variety basmati-370. Variety Pusa-1121 was found significantly different from other two varieties in yield during three years. Effect of different planting dates and varieties on growth and yield of rice (Pooled data of 3 years) Treatments Plant height (cm) Direct seeding of rice / Date of Transplanting Grain Yield (q ha -1 ) Straw Yield (qha -1 ) D 1 - 1 st June 136.45 28.42 76.56 D 2 - 16 June 126.91 25.13 71.89 D 3 -1 st July 116.62 21.82 65.89 CD (5%) 1.93 1.40 5.13 Varieties V 1 - Pusa-1121 116.15 24.57 72.22 V 2 -Basmati-370 158.48 21.08 80.63 V 3 -SRJ-129 105.15 29.72 61.45 CD (5%) 1.93 1.40 5.13 Conclusion Based on three years study, rice variety when sown on SRJ-129 when sown on 1 st June can perform better than other planting dates and varieties in irrigated Subtropical conditions in Union Territory of J&K. References Bashir, M.S., Akbar, N., Iqbal, A. and Zaman, H. 2010. Effect of different sowing Dates on yield and yield components of direct seeded coarse rice (Oryza sativa). Pak. J. Agric. Sci. 47(4), 361-365. Banotra, M., Sharma, B.C., Samanta, A., Gupta, L. and Kumar, R. 2021.Production and economics of irrigated transplanted basmati rice (Oryza sativa) as influenced by substitution of nutrients through organics in Jammu region of India. 66 (3): 295 -299. Cocharn, G. and Cox, G.M. 1963. Experimental design. Asia Publishing House, Bombay, India. Thomas, N., and Lal G ML. 2012. Genetic divergence in rice genotypes under irrigated conditions. Ann. Pl. and Soil Res. 14 (1): 109-112. Climate resilient agriculture for risk mitigation 295 | Page
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Extended Summaries 22-24 December,
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Citation Rama Rao, C.A., Srinivasa
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Resilience through land and water m
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International Conference on Reimagi
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Theme- 2 Ecosystem based approaches
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